Nitrous issues spraying off the line, need assistance (Video)
10-22-2009, 03:59 PM
#1
Nitrous issues spraying off the line, need assistance (Video) Took my Bird to a track rental this past week to work on my driving and setting a new best. I was running a 75HP shot initially which ran fine and then popped in the 100HP jets on my wet TNT kit with NANO.
Now when I would launch the car at 52XXrpm and go WOT right after getting off the line, the car would buck and bog horribly then would spray beautifully down the track. My dad got video of one of these runs and you can clearly see what is happening. Seems the fuel is flowing but not the nitrous except this is ONLY happening right after the car is launched.
The bottle sits in line with the rear axle but we also tried having it face forward but at a steep angle to fit in the trunk. Again, no issue on the 75's but with the 100s, problems. It may not be related but just coincidence this happened when the jets were changed. I also started launching the car much harder with the 100s. Still odd.
I thought the bottle might be low so I had it filled but still had the issue. Any guesses as to whats going?
http://www.youtube.com/watch?v=DaAT5fyWJnU
http://www.youtube.com/watch?v=eLkXFpQVc5I
Now when I would launch the car at 52XXrpm and go WOT right after getting off the line, the car would buck and bog horribly then would spray beautifully down the track. My dad got video of one of these runs and you can clearly see what is happening. Seems the fuel is flowing but not the nitrous except this is ONLY happening right after the car is launched.
The bottle sits in line with the rear axle but we also tried having it face forward but at a steep angle to fit in the trunk. Again, no issue on the 75's but with the 100s, problems. It may not be related but just coincidence this happened when the jets were changed. I also started launching the car much harder with the 100s. Still odd.
I thought the bottle might be low so I had it filled but still had the issue. Any guesses as to whats going?
http://www.youtube.com/watch?v=DaAT5fyWJnU
http://www.youtube.com/watch?v=eLkXFpQVc5I
10-22-2009, 09:26 PM
#2
Its RICH ! Black smoke= bad.
What rpm is the N20 coming on?
Your launching at 5,000 or what ever but the car bogs like hell then the N20 turns on at a very low RPM be careful doing that it might backfire BAD.
Spray that ***** right away you need more power to keep the car from bogging.
What rpm is the N20 coming on?
Your launching at 5,000 or what ever but the car bogs like hell then the N20 turns on at a very low RPM be careful doing that it might backfire BAD.
Spray that ***** right away you need more power to keep the car from bogging.
10-22-2009, 09:56 PM
#4
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I was there most of the day and will most likely be there helping fix the car so I'll try and move this thread along...
Spray comes on at 3000rpms via window switch, launch was 5200rpms.
Yes, thank you... we're trying to figure out WHY only fuel is spraying at first. We know that's what it's doing for the first 30-50ft.
Its RICH ! Black smoke= bad.
What rpm is the N20 coming on?
Your launching at 5,000 or what ever but the car bogs like hell then the N20 turns on at a very low RPM be careful doing that it might backfire BAD.
Spray that ***** right away you need more power to keep the car from bogging.
What rpm is the N20 coming on?
Your launching at 5,000 or what ever but the car bogs like hell then the N20 turns on at a very low RPM be careful doing that it might backfire BAD.
Spray that ***** right away you need more power to keep the car from bogging.
Yes, thank you... we're trying to figure out WHY only fuel is spraying at first. We know that's what it's doing for the first 30-50ft.
10-22-2009, 10:10 PM
#6
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No delay whatsoever. I believe there's a window switch wired in... I don't recall if the HSW interface can act as a window switch otherwise that would be it. With the "75hp" pills in the car it left hard with no rich problems at any point. Switching to the "100hp" pills was the only change between it running great and running like crap for the first 30-50ft.
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10-22-2009, 10:17 PM
#8
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With the jets that are in it right now(100hp... i don't recall what size orifice on each off the top of my head) the car is only rich for the first 50ft... beyond that it leans out to 11.5 - 11.9, right where it should be.
10-22-2009, 10:43 PM
#11
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Plugs haven't been pulled yet but im sure they're black.
Mid-11s actually is where this car should be IMO. It's close to 4k lbs raceweight and the h/c package isn't anywhere near optimum for the setup. Also with the 3.73 gears i dont see the car sixtying much less than a 1.7x unless a lot of weight is removed, and thankfully Brian doesn't seem to have any interest in that.
10-22-2009, 10:47 PM
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Anyone else notice it took like 4 purges to get nitrous to the lines?...maybe something funkey there?...but i dont see how jets would do that....strange
10-23-2009, 12:38 AM
#14
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i would check that you have the correct bottle valve. i'm not sure if there are other manufactures, the one i use is nx 45* valve which has a dedicated orifice for the nano set=ups and bypasses the main outflow orifice.
the other possible cause would not enough bottle tilt angle should be 35* to 45* if mounted across. the pick up tube has to be facing down. finally the wiring terminals,butt splices, for the power supply to the noids should be solder, no exceptions. don't do any thing else until you ck. these things out. hold the purge button on until you see a nice plume, then count to 3, there should be no interruption [brake-up] of the plume, otherwise it's a clue that your bottle is not tilted enough or the wrong valve is installed. good luck.
the other possible cause would not enough bottle tilt angle should be 35* to 45* if mounted across. the pick up tube has to be facing down. finally the wiring terminals,butt splices, for the power supply to the noids should be solder, no exceptions. don't do any thing else until you ck. these things out. hold the purge button on until you see a nice plume, then count to 3, there should be no interruption [brake-up] of the plume, otherwise it's a clue that your bottle is not tilted enough or the wrong valve is installed. good luck.
10-23-2009, 04:13 AM
#15
+1 on rechecking and then rechecking the current jets now.
10-23-2009, 04:34 AM
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Another word of advice, dont trust a wideband on a nitrous car. Pull a plug and check it.
10-23-2009, 05:47 AM
#17
Thanks for the replies so far. Looks like a good amount of activity while I was asleep.
Anywho, I have the correct 100hp jets as per the TNT supplied card with the kit. I've run this kit for a good amount of time and this has been my first issue with it.
I am using a NX 45 deg valve with the NANO. I do agree that it does it does bother me how long it takes the nitrous to show on a purge. Even when it did finally start coming out, it was not totally steady. I'll check all of my connections on the nitrous side for any leaks and maybe thinking about moving the bottle in the cabin mounted right in between the rear seats for a better angle. Maybe the tilt of the car on launch is causing the issue.
Btw, for my own knowledge why would the wideband not be reasonably accurate to determine my A/F?
Anywho, I have the correct 100hp jets as per the TNT supplied card with the kit. I've run this kit for a good amount of time and this has been my first issue with it.
I am using a NX 45 deg valve with the NANO. I do agree that it does it does bother me how long it takes the nitrous to show on a purge. Even when it did finally start coming out, it was not totally steady. I'll check all of my connections on the nitrous side for any leaks and maybe thinking about moving the bottle in the cabin mounted right in between the rear seats for a better angle. Maybe the tilt of the car on launch is causing the issue.
Btw, for my own knowledge why would the wideband not be reasonably accurate to determine my A/F?
10-23-2009, 07:26 AM
#18
With a full bottle the angle doesnt mean much, I doubt thats the problem.
Wideband is 1 sensor giving you and average of 1 side of the motor.
So #1 cyl. could be 10:1 and #7 cyl. could be 15:1 giving you an average of 12.5:1 see the problem. Then you have NO idea what the other 1/2 of the motor is doing.
Wideband is 1 sensor giving you and average of 1 side of the motor.
So #1 cyl. could be 10:1 and #7 cyl. could be 15:1 giving you an average of 12.5:1 see the problem. Then you have NO idea what the other 1/2 of the motor is doing.
10-23-2009, 07:51 AM
#20
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This car doesn't have a fpss does it?
If I had to trouble shoot this car and if you guys have done everything you can. I would take it back to a basic kit istall and see how its runs without the window with out the nano and anything else.
If I had to trouble shoot this car and if you guys have done everything you can. I would take it back to a basic kit istall and see how its runs without the window with out the nano and anything else.